diff --git a/fuzzers/.gitignore b/fuzzers/.gitignore
index 01a18a08..9482bcd3 100644
--- a/fuzzers/.gitignore
+++ b/fuzzers/.gitignore
@@ -1,2 +1,2 @@
-timing3.csv
-timing3.txt
+build
+run.ok
diff --git a/fuzzers/005-tilegrid/.gitignore b/fuzzers/005-tilegrid/.gitignore
deleted file mode 100644
index 378eac25..00000000
--- a/fuzzers/005-tilegrid/.gitignore
+++ /dev/null
@@ -1 +0,0 @@
-build
diff --git a/fuzzers/007-timing/.gitignore b/fuzzers/007-timing/.gitignore
deleted file mode 100644
index 9ef96044..00000000
--- a/fuzzers/007-timing/.gitignore
+++ /dev/null
@@ -1,2 +0,0 @@
-build
-
diff --git a/fuzzers/007-timing/minitest/test_unique/.gitignore b/fuzzers/007-timing/minitest/test_unique/.gitignore
deleted file mode 100644
index 374eddc2..00000000
--- a/fuzzers/007-timing/minitest/test_unique/.gitignore
+++ /dev/null
@@ -1,3 +0,0 @@
-specimen_*
-build
-
diff --git a/fuzzers/007-timing/timgrid/.gitignore b/fuzzers/007-timing/timgrid/.gitignore
deleted file mode 100644
index 378eac25..00000000
--- a/fuzzers/007-timing/timgrid/.gitignore
+++ /dev/null
@@ -1 +0,0 @@
-build
diff --git a/fuzzers/010-lutinit/.gitignore b/fuzzers/010-lutinit/.gitignore
deleted file mode 100644
index 9482bcd3..00000000
--- a/fuzzers/010-lutinit/.gitignore
+++ /dev/null
@@ -1,2 +0,0 @@
-build
-run.ok
diff --git a/fuzzers/011-ffconfig/.gitignore b/fuzzers/011-ffconfig/.gitignore
deleted file mode 100644
index 9ef96044..00000000
--- a/fuzzers/011-ffconfig/.gitignore
+++ /dev/null
@@ -1,2 +0,0 @@
-build
-
diff --git a/fuzzers/012-clbn5ffmux/.gitignore b/fuzzers/012-clbn5ffmux/.gitignore
deleted file mode 100644
index 9ef96044..00000000
--- a/fuzzers/012-clbn5ffmux/.gitignore
+++ /dev/null
@@ -1,2 +0,0 @@
-build
-
diff --git a/fuzzers/013-clbncy0/.gitignore b/fuzzers/013-clbncy0/.gitignore
deleted file mode 100644
index 378eac25..00000000
--- a/fuzzers/013-clbncy0/.gitignore
+++ /dev/null
@@ -1 +0,0 @@
-build
diff --git a/fuzzers/014-ffsrcemux/.gitignore b/fuzzers/014-ffsrcemux/.gitignore
deleted file mode 100644
index 378eac25..00000000
--- a/fuzzers/014-ffsrcemux/.gitignore
+++ /dev/null
@@ -1 +0,0 @@
-build
diff --git a/fuzzers/015-clbnffmux/.gitignore b/fuzzers/015-clbnffmux/.gitignore
deleted file mode 100644
index 378eac25..00000000
--- a/fuzzers/015-clbnffmux/.gitignore
+++ /dev/null
@@ -1 +0,0 @@
-build
diff --git a/fuzzers/016-clbnoutmux/.gitignore b/fuzzers/016-clbnoutmux/.gitignore
deleted file mode 100644
index 9ef96044..00000000
--- a/fuzzers/016-clbnoutmux/.gitignore
+++ /dev/null
@@ -1,2 +0,0 @@
-build
-
diff --git a/fuzzers/017-clbprecyinit/.gitignore b/fuzzers/017-clbprecyinit/.gitignore
deleted file mode 100644
index 9ef96044..00000000
--- a/fuzzers/017-clbprecyinit/.gitignore
+++ /dev/null
@@ -1,2 +0,0 @@
-build
-
diff --git a/fuzzers/018-clbram/.gitignore b/fuzzers/018-clbram/.gitignore
deleted file mode 100644
index 378eac25..00000000
--- a/fuzzers/018-clbram/.gitignore
+++ /dev/null
@@ -1 +0,0 @@
-build
diff --git a/fuzzers/019-ndi1mux/.gitignore b/fuzzers/019-ndi1mux/.gitignore
deleted file mode 100644
index 378eac25..00000000
--- a/fuzzers/019-ndi1mux/.gitignore
+++ /dev/null
@@ -1 +0,0 @@
-build
diff --git a/fuzzers/025-bram-config/.gitignore b/fuzzers/025-bram-config/.gitignore
deleted file mode 100644
index 378eac25..00000000
--- a/fuzzers/025-bram-config/.gitignore
+++ /dev/null
@@ -1 +0,0 @@
-build
diff --git a/fuzzers/025-bram-config/minitest/.gitignore b/fuzzers/025-bram-config/minitest/.gitignore
deleted file mode 100644
index 378eac25..00000000
--- a/fuzzers/025-bram-config/minitest/.gitignore
+++ /dev/null
@@ -1 +0,0 @@
-build
diff --git a/fuzzers/026-bram-data/.gitignore b/fuzzers/026-bram-data/.gitignore
deleted file mode 100644
index 378eac25..00000000
--- a/fuzzers/026-bram-data/.gitignore
+++ /dev/null
@@ -1 +0,0 @@
-build
diff --git a/fuzzers/026-bram-data/minitest/.gitignore b/fuzzers/026-bram-data/minitest/.gitignore
deleted file mode 100644
index 378eac25..00000000
--- a/fuzzers/026-bram-data/minitest/.gitignore
+++ /dev/null
@@ -1 +0,0 @@
-build
diff --git a/fuzzers/030-iob/.gitignore b/fuzzers/030-iob/.gitignore
deleted file mode 100644
index 378eac25..00000000
--- a/fuzzers/030-iob/.gitignore
+++ /dev/null
@@ -1 +0,0 @@
-build
diff --git a/fuzzers/030-iob/minitest/.gitignore b/fuzzers/030-iob/minitest/.gitignore
deleted file mode 100644
index 378eac25..00000000
--- a/fuzzers/030-iob/minitest/.gitignore
+++ /dev/null
@@ -1 +0,0 @@
-build
diff --git a/fuzzers/031-mmcm/.gitignore b/fuzzers/031-mmcm/.gitignore
deleted file mode 100644
index 378eac25..00000000
--- a/fuzzers/031-mmcm/.gitignore
+++ /dev/null
@@ -1 +0,0 @@
-build
diff --git a/fuzzers/032-pll/.gitignore b/fuzzers/032-pll/.gitignore
deleted file mode 100644
index 378eac25..00000000
--- a/fuzzers/032-pll/.gitignore
+++ /dev/null
@@ -1 +0,0 @@
-build
diff --git a/fuzzers/050-intpips/.gitignore b/fuzzers/050-intpips/.gitignore
deleted file mode 100644
index 9482bcd3..00000000
--- a/fuzzers/050-intpips/.gitignore
+++ /dev/null
@@ -1,2 +0,0 @@
-build
-run.ok
diff --git a/fuzzers/051-imuxlout/.gitignore b/fuzzers/051-imuxlout/.gitignore
deleted file mode 100644
index 9482bcd3..00000000
--- a/fuzzers/051-imuxlout/.gitignore
+++ /dev/null
@@ -1,2 +0,0 @@
-build
-run.ok
diff --git a/fuzzers/052-clkin/.gitignore b/fuzzers/052-clkin/.gitignore
deleted file mode 100644
index 9482bcd3..00000000
--- a/fuzzers/052-clkin/.gitignore
+++ /dev/null
@@ -1,2 +0,0 @@
-build
-run.ok
diff --git a/fuzzers/053-ctrlin/.gitignore b/fuzzers/053-ctrlin/.gitignore
deleted file mode 100644
index 9482bcd3..00000000
--- a/fuzzers/053-ctrlin/.gitignore
+++ /dev/null
@@ -1,2 +0,0 @@
-build
-run.ok
diff --git a/fuzzers/054-gfan/.gitignore b/fuzzers/054-gfan/.gitignore
deleted file mode 100644
index 9482bcd3..00000000
--- a/fuzzers/054-gfan/.gitignore
+++ /dev/null
@@ -1,2 +0,0 @@
-build
-run.ok
diff --git a/fuzzers/055-gnd/.gitignore b/fuzzers/055-gnd/.gitignore
deleted file mode 100644
index 9482bcd3..00000000
--- a/fuzzers/055-gnd/.gitignore
+++ /dev/null
@@ -1,2 +0,0 @@
-build
-run.ok
diff --git a/fuzzers/056-rempips/.gitignore b/fuzzers/056-rempips/.gitignore
deleted file mode 100644
index 9482bcd3..00000000
--- a/fuzzers/056-rempips/.gitignore
+++ /dev/null
@@ -1,2 +0,0 @@
-build
-run.ok
diff --git a/fuzzers/057-bipips/.gitignore b/fuzzers/057-bipips/.gitignore
deleted file mode 100644
index 9482bcd3..00000000
--- a/fuzzers/057-bipips/.gitignore
+++ /dev/null
@@ -1,2 +0,0 @@
-build
-run.ok
diff --git a/fuzzers/058-hclkpips/.gitignore b/fuzzers/058-hclkpips/.gitignore
index 83e2d310..9482bcd3 100644
--- a/fuzzers/058-hclkpips/.gitignore
+++ b/fuzzers/058-hclkpips/.gitignore
@@ -1,4 +1,2 @@
-/specimen_*/
-/seg_hclk_[lr].segbits
-/mask_hclk_[lr].segbits
-/ppips_hclk_[lr].txt
+build
+run.ok
diff --git a/fuzzers/058-hclkpips/Makefile b/fuzzers/058-hclkpips/Makefile
index 9586990a..6a88ea55 100644
--- a/fuzzers/058-hclkpips/Makefile
+++ b/fuzzers/058-hclkpips/Makefile
@@ -1,24 +1,24 @@
 
 N := 2
-SPECIMENS := $(addprefix specimen_,$(shell seq -f '%03.0f' $(N)))
+SPECIMENS := $(addprefix build/specimen_,$(shell seq -f '%03.0f' $(N)))
 SPECIMENS_OK := $(addsuffix /OK,$(SPECIMENS))
 
 database: $(SPECIMENS_OK)
-	${XRAY_SEGMATCH} -o segbits_hclk_l.db $(addsuffix /segdata_hclk_l_design_*.txt,$(SPECIMENS))
-	${XRAY_SEGMATCH} -o segbits_hclk_r.db $(addsuffix /segdata_hclk_r_design_*.txt,$(SPECIMENS))
+	${XRAY_SEGMATCH} -o build/segbits_hclk_l.db $(addsuffix /segdata_hclk_l_design_*.txt,$(SPECIMENS))
+	${XRAY_SEGMATCH} -o build/segbits_hclk_r.db $(addsuffix /segdata_hclk_r_design_*.txt,$(SPECIMENS))
 	${XRAY_MASKMERGE} mask_hclk_l.db $(addsuffix /segdata_hclk_l_design_*.txt,$(SPECIMENS))
 	${XRAY_MASKMERGE} mask_hclk_r.db $(addsuffix /segdata_hclk_r_design_*.txt,$(SPECIMENS))
-	grep CK_INOUT segbits_hclk_l.db | sed 's, .*, always,' > ppips_hclk_l.txt
-	grep CK_INOUT segbits_hclk_r.db | sed 's, .*, always,' > ppips_hclk_r.txt
+	grep CK_INOUT segbits_hclk_l.db | sed 's, .*, always,' > build/ppips_hclk_l.txt
+	grep CK_INOUT segbits_hclk_r.db | sed 's, .*, always,' > build/ppips_hclk_r.txt
 
 pushdb:
 	${XRAY_DBFIXUP} --db-root . --clb-int
-	${XRAY_MERGEDB} hclk_l segbits_hclk_l.db
-	${XRAY_MERGEDB} hclk_r segbits_hclk_r.db
-	${XRAY_MERGEDB} mask_hclk_l mask_hclk_l.db
-	${XRAY_MERGEDB} mask_hclk_r mask_hclk_r.db
-	cp ppips_hclk_l.txt  ${XRAY_DATABASE_DIR}/$(XRAY_DATABASE)/ppips_hclk_l.db
-	cp ppips_hclk_r.txt  ${XRAY_DATABASE_DIR}/$(XRAY_DATABASE)/ppips_hclk_r.db
+	${XRAY_MERGEDB} hclk_l build/segbits_hclk_l.db
+	${XRAY_MERGEDB} hclk_r build/segbits_hclk_r.db
+	${XRAY_MERGEDB} mask_hclk_l build/mask_hclk_l.db
+	${XRAY_MERGEDB} mask_hclk_r build/mask_hclk_r.db
+	cp build/ppips_hclk_l.txt  ${XRAY_DATABASE_DIR}/$(XRAY_DATABASE)/ppips_hclk_l.db
+	cp build/ppips_hclk_r.txt  ${XRAY_DATABASE_DIR}/$(XRAY_DATABASE)/ppips_hclk_r.db
 
 $(SPECIMENS_OK):
 	bash generate.sh $(subst /OK,,$@)
@@ -30,7 +30,7 @@ run:
 	$(MAKE) pushdb
 
 clean:
-	rm -rf specimen_[0-9][0-9][0-9]/ seg_hclk_[lr].db mask_hclk_[lr].segbits ppips_hclk_[lr].txt run.ok
+	rm -rf build run.ok
 
 .PHONY: database pushdb run clean
 
diff --git a/fuzzers/058-hclkpips/generate.sh b/fuzzers/058-hclkpips/generate.sh
index 9088b14a..34a820fe 100644
--- a/fuzzers/058-hclkpips/generate.sh
+++ b/fuzzers/058-hclkpips/generate.sh
@@ -2,11 +2,11 @@
 
 source ${XRAY_GENHEADER}
 
-vivado -mode batch -source ../generate.tcl
+vivado -mode batch -source $FUZDIR/generate.tcl
 
 for x in design_*.bit; do
 	${XRAY_BITREAD} -F $XRAY_ROI_FRAMES -o ${x}s -z -y ${x}
 done
 
-python3 ../generate.py $(ls design_*.bit | cut -f1 -d.)
+python3 $FUZDIR/generate.py $(ls design_*.bit | cut -f1 -d.)
 
diff --git a/fuzzers/058-hclkpips/generate.tcl b/fuzzers/058-hclkpips/generate.tcl
index 6a346c30..40a07d95 100644
--- a/fuzzers/058-hclkpips/generate.tcl
+++ b/fuzzers/058-hclkpips/generate.tcl
@@ -1,6 +1,8 @@
+source "$::env(XRAY_DIR)/utils/utils.tcl"
+
 create_project -force -part $::env(XRAY_PART) design design
 
-read_verilog ../top.v
+read_verilog $::env(FUZDIR)/top.v
 synth_design -top top
 
 set_property -dict "PACKAGE_PIN $::env(XRAY_PIN_00) IOSTANDARD LVCMOS33" [get_ports i]
@@ -19,8 +21,6 @@ route_design
 
 write_checkpoint -force design.dcp
 
-source ../../../utils/utils.tcl
-
 if [regexp "_001$" [pwd]] {set tile [lindex [filter [roi_tiles] {TILE_TYPE == HCLK_L}] 0]}
 if [regexp "_002$" [pwd]] {set tile [lindex [filter [roi_tiles] {TILE_TYPE == HCLK_R}] 0]}
 
diff --git a/fuzzers/100-dsp-mskpat/.gitignore b/fuzzers/100-dsp-mskpat/.gitignore
deleted file mode 100644
index 9482bcd3..00000000
--- a/fuzzers/100-dsp-mskpat/.gitignore
+++ /dev/null
@@ -1,2 +0,0 @@
-build
-run.ok